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                    1. MobX 介绍
            
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                    3.2. @observable
            
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                    3.3. objects
            
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                    4.4. reaction
            
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                    4.5. (@)observer
            
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                    4.6. 理解 MobX 对何作出响应
            
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                    5. 改变 observables
            
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                    5.1. action
            
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                    5.2. async actions & flows
            
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                    6. 工具函数
            
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                    6.2. extendObservable
            
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                    6.4. intercept & observe
            
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                    6.5. mobxUtils.fromPromise
            
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                    6.6. mobxUtils.fromResource
            
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                    6.7. mobxUtils.toStream
            
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                    6.8. mobxUtils.fromStream
            
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                    6.10. mobxUtils.createTransformer
            
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                    8. 贴士与技巧
            
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                    8.1. 常见问题解答
            
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                    8.2. 常见陷阱与最佳实践
            
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    <h1>
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        <a href=".." >5.1. action</a>
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                                <h1 id="action-&#x52A8;&#x4F5C;"><a name="action-&#x52A8;&#x4F5C;" class="plugin-anchor" href="#action-&#x52A8;&#x4F5C;"><i class="fa fa-link" aria-hidden="true"></i></a>action (&#x52A8;&#x4F5C;)</h1>
<details>
    <summary style="color: white; background:green;padding:5px;margin:5px;border-radius:2px">egghead.io &#x7B2C;5&#x8BFE;: actions</summary>
    <br>
    <div style="padding:5px;">
        <iframe style="border: none;" width="760" height="427" src="https://egghead.io/lessons/react-use-mobx-actions-to-change-and-guard-state/embed">
    </iframe></div>
    <a style="font-style:italic;padding:5px;margin:5px;" href="https://egghead.io/lessons/react-use-mobx-actions-to-change-and-guard-state" target="_blank">&#x5728; egghead.io &#x4E0A;&#x89C2;&#x770B;</a>
</details>

<p>&#x7528;&#x6CD5;:</p>
<ul>
<li><code>action(fn)</code></li>
<li><code>action(name, fn)</code></li>
<li><code>@action classMethod() {}</code></li>
<li><code>@action(name) classMethod () {}</code></li>
<li><code>@action boundClassMethod = (args) =&gt; { body }</code></li>
<li><code>@action(name) boundClassMethod = (args) =&gt; { body }</code></li>
<li><code>@action.bound classMethod() {}</code></li>
</ul>
<p>&#x4EFB;&#x4F55;&#x5E94;&#x7528;&#x90FD;&#x6709;&#x52A8;&#x4F5C;&#x3002;&#x52A8;&#x4F5C;&#x662F;&#x4EFB;&#x4F55;&#x7528;&#x6765;&#x4FEE;&#x6539;&#x72B6;&#x6001;&#x7684;&#x4E1C;&#x897F;&#x3002;
&#x4F7F;&#x7528;MobX&#x4F60;&#x53EF;&#x4EE5;&#x5728;&#x4EE3;&#x7801;&#x4E2D;&#x663E;&#x5F0F;&#x5730;&#x6807;&#x8BB0;&#x51FA;&#x52A8;&#x4F5C;&#x6240;&#x5728;&#x7684;&#x4F4D;&#x7F6E;&#x3002;
&#x52A8;&#x4F5C;&#x53EF;&#x4EE5;&#x6709;&#x52A9;&#x4E8E;&#x66F4;&#x597D;&#x7684;&#x7EC4;&#x7EC7;&#x4EE3;&#x7801;&#x3002;</p>
<p>&#x5B83;&#x63A5;&#x6536;&#x4E00;&#x4E2A;&#x51FD;&#x6570;&#x5E76;&#x8FD4;&#x56DE;&#x5177;&#x6709;&#x540C;&#x6837;&#x7B7E;&#x540D;&#x7684;&#x51FD;&#x6570;&#xFF0C;&#x4F46;&#x662F;&#x7528; <code>transaction</code>&#x3001;<code>untracked</code> &#x548C; <code>allowStateChanges</code> &#x5305;&#x88F9;&#x8D77;&#x6765;&#xFF0C;&#x5C24;&#x5176;&#x662F; <code>transaction</code> &#x7684;&#x81EA;&#x52A8;&#x5E94;&#x7528;&#x4F1A;&#x4EA7;&#x751F;&#x5DE8;&#x5927;&#x7684;&#x6027;&#x80FD;&#x6536;&#x76CA;&#xFF0C;
&#x52A8;&#x4F5C;&#x4F1A;&#x5206;&#x6279;&#x5904;&#x7406;&#x53D8;&#x5316;&#x5E76;&#x53EA;&#x5728;(&#x6700;&#x5916;&#x5C42;&#x7684;)&#x52A8;&#x4F5C;&#x5B8C;&#x6210;&#x540E;&#x901A;&#x77E5;&#x8BA1;&#x7B97;&#x503C;&#x548C;&#x53CD;&#x5E94;&#x3002;
&#x8FD9;&#x5C06;&#x786E;&#x4FDD;&#x5728;&#x52A8;&#x4F5C;&#x5B8C;&#x6210;&#x4E4B;&#x524D;&#xFF0C;&#x5728;&#x52A8;&#x4F5C;&#x671F;&#x95F4;&#x751F;&#x6210;&#x7684;&#x4E2D;&#x95F4;&#x503C;&#x6216;&#x672A;&#x5B8C;&#x6210;&#x7684;&#x503C;&#x5BF9;&#x5E94;&#x7528;&#x7684;&#x5176;&#x4F59;&#x90E8;&#x5206;&#x662F;&#x4E0D;&#x53EF;&#x89C1;&#x7684;&#x3002;</p>
<p>&#x5EFA;&#x8BAE;&#x5BF9;&#x4EFB;&#x4F55;&#x4FEE;&#x6539; observables &#x6216;&#x5177;&#x6709;&#x526F;&#x4F5C;&#x7528;&#x7684;&#x51FD;&#x6570;&#x4F7F;&#x7528; <code>(@)action</code> &#x3002;
&#x7ED3;&#x5408;&#x5F00;&#x53D1;&#x8005;&#x5DE5;&#x5177;&#x7684;&#x8BDD;&#xFF0C;&#x52A8;&#x4F5C;&#x8FD8;&#x80FD;&#x63D0;&#x4F9B;&#x975E;&#x5E38;&#x6709;&#x7528;&#x7684;&#x8C03;&#x8BD5;&#x4FE1;&#x606F;&#x3002;</p>
<p>&#x4E0D;&#x652F;&#x6301;&#x4F7F;&#x7528; setters &#x7684; <code>@action</code> &#x88C5;&#x9970;&#x5668;&#xFF0C;&#x4F46;&#x662F;&#xFF0C;<a href="https://github.com/mobxjs/mobx/blob/gh-pages/docs/refguide/computed-decorator.md#setters-for-computed-values" target="_blank">&#x8BA1;&#x7B97;&#x5C5E;&#x6027;&#x7684; setters &#x662F;&#x81EA;&#x52A8;&#x7684;&#x52A8;&#x4F5C;</a>&#x3002;</p>
<p>&#x6CE8;&#x610F;: &#x5728;&#x5C06; MobX &#x914D;&#x7F6E;&#x4E3A;&#x9700;&#x8981;&#x901A;&#x8FC7;&#x52A8;&#x4F5C;&#x6765;&#x66F4;&#x6539;&#x72B6;&#x6001;&#x65F6;&#xFF0C;&#x5FC5;&#x987B;&#x4F7F;&#x7528; <code>action</code> &#xFF0C;&#x53C2;&#x89C1; <a href="https://github.com/mobxjs/mobx/blob/gh-pages/docs/refguide/api.md#configure" target="_blank"><code>enforceActions</code></a>&#x3002;</p>
<h2 id="&#x4F55;&#x65F6;&#x4F7F;&#x7528;&#x52A8;&#x4F5C;&#xFF1F;"><a name="&#x4F55;&#x65F6;&#x4F7F;&#x7528;&#x52A8;&#x4F5C;&#xFF1F;" class="plugin-anchor" href="#&#x4F55;&#x65F6;&#x4F7F;&#x7528;&#x52A8;&#x4F5C;&#xFF1F;"><i class="fa fa-link" aria-hidden="true"></i></a>&#x4F55;&#x65F6;&#x4F7F;&#x7528;&#x52A8;&#x4F5C;&#xFF1F;</h2>
<p>&#x5E94;&#x8BE5;&#x6C38;&#x8FDC;&#x53EA;&#x5BF9;<strong>&#x4FEE;&#x6539;</strong>&#x72B6;&#x6001;&#x7684;&#x51FD;&#x6570;&#x4F7F;&#x7528;&#x52A8;&#x4F5C;&#x3002;
&#x53EA;&#x6267;&#x884C;&#x67E5;&#x627E;&#xFF0C;&#x8FC7;&#x6EE4;&#x5668;&#x7B49;&#x51FD;&#x6570;<strong>&#x4E0D;</strong>&#x5E94;&#x8BE5;&#x88AB;&#x6807;&#x8BB0;&#x4E3A;&#x52A8;&#x4F5C;&#xFF0C;&#x4EE5;&#x5141;&#x8BB8; MobX &#x8DDF;&#x8E2A;&#x5B83;&#x4EEC;&#x7684;&#x8C03;&#x7528;&#x3002;</p>
<p><a href="https://github.com/mobxjs/mobx/blob/gh-pages/docs/refguide/api.md#configure" target="_blank">&#x201C;&#x5F3A;&#x5236;&#x52A8;&#x4F5C;&#x201D;</a> &#x5F3A;&#x5236;&#x6240;&#x6709;&#x72B6;&#x6001;&#x53D8;&#x66F4;&#x90FD;&#x5FC5;&#x987B;&#x901A;&#x8FC7;&#x52A8;&#x4F5C;&#x6765;&#x5B8C;&#x6210;&#x3002;&#x5728;&#x5927;&#x578B;&#x3001;&#x957F;&#x671F;&#x7684;&#x9879;&#x76EE;&#x4E2D;&#xFF0C;&#x8FD9;&#x662F;&#x5341;&#x5206;&#x6709;&#x7528;&#x7684;&#x6700;&#x4F73;&#x5B9E;&#x8DF5;&#x3002;</p>
<h2 id="&#x7ED1;&#x5B9A;&#x7684;&#x52A8;&#x4F5C;"><a name="&#x7ED1;&#x5B9A;&#x7684;&#x52A8;&#x4F5C;" class="plugin-anchor" href="#&#x7ED1;&#x5B9A;&#x7684;&#x52A8;&#x4F5C;"><i class="fa fa-link" aria-hidden="true"></i></a>&#x7ED1;&#x5B9A;&#x7684;&#x52A8;&#x4F5C;</h2>
<p><code>action</code> &#x88C5;&#x9970;&#x5668;/&#x51FD;&#x6570;&#x9075;&#x5FAA; javascript &#x4E2D;&#x6807;&#x51C6;&#x7684;&#x7ED1;&#x5B9A;&#x89C4;&#x5219;&#x3002;
&#x4F46;&#x662F;&#xFF0C;<code>action.bound</code> &#x53EF;&#x4EE5;&#x7528;&#x6765;&#x81EA;&#x52A8;&#x5730;&#x5C06;&#x52A8;&#x4F5C;&#x7ED1;&#x5B9A;&#x5230;&#x76EE;&#x6807;&#x5BF9;&#x8C61;&#x3002;
&#x6CE8;&#x610F;&#xFF0C;&#x4E0E; <code>action</code> &#x4E0D;&#x540C;&#x7684;&#x662F;&#xFF0C;<code>(@)action.bound</code> &#x4E0D;&#x9700;&#x8981;&#x4E00;&#x4E2A;name&#x53C2;&#x6570;&#xFF0C;&#x540D;&#x79F0;&#x5C06;&#x59CB;&#x7EC8;&#x57FA;&#x4E8E;&#x52A8;&#x4F5C;&#x7ED1;&#x5B9A;&#x7684;&#x5C5E;&#x6027;&#x3002;</p>
<p>&#x793A;&#x4F8B;:</p>
<pre><code class="lang-javascript"><span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">Ticker</span> </span>{
    @observable tick = <span class="hljs-number">0</span>

    @action.bound
    increment() {
        <span class="hljs-keyword">this</span>.tick++ <span class="hljs-comment">// &apos;this&apos; &#x6C38;&#x8FDC;&#x90FD;&#x662F;&#x6B63;&#x786E;&#x7684;</span>
    }
}

<span class="hljs-keyword">const</span> ticker = <span class="hljs-keyword">new</span> Ticker()
setInterval(ticker.increment, <span class="hljs-number">1000</span>)
</code></pre>
<p><em>&#x6CE8;&#x610F;: <em>action.bound</em> &#x4E0D;&#x8981;&#x548C;&#x7BAD;&#x5934;&#x51FD;&#x6570;&#x4E00;&#x8D77;&#x4F7F;&#x7528;&#xFF1B;&#x7BAD;&#x5934;&#x51FD;&#x6570;&#x5DF2;&#x7ECF;&#x662F;&#x7ED1;&#x5B9A;&#x8FC7;&#x7684;&#x5E76;&#x4E14;&#x4E0D;&#x80FD;&#x91CD;&#x65B0;&#x7ED1;&#x5B9A;&#x3002;</em></p>
<h2 id="runinactionname-thunk"><a name="runinactionname-thunk" class="plugin-anchor" href="#runinactionname-thunk"><i class="fa fa-link" aria-hidden="true"></i></a><code>runInAction(name?, thunk)</code></h2>
<p><code>runInAction</code> &#x662F;&#x4E2A;&#x7B80;&#x5355;&#x7684;&#x5DE5;&#x5177;&#x51FD;&#x6570;&#xFF0C;&#x5B83;&#x63A5;&#x6536;&#x4EE3;&#x7801;&#x5757;&#x5E76;&#x5728;(&#x5F02;&#x6B65;&#x7684;)&#x52A8;&#x4F5C;&#x4E2D;&#x6267;&#x884C;&#x3002;&#x8FD9;&#x5BF9;&#x4E8E;&#x5373;&#x65F6;&#x521B;&#x5EFA;&#x548C;&#x6267;&#x884C;&#x52A8;&#x4F5C;&#x975E;&#x5E38;&#x6709;&#x7528;&#xFF0C;&#x4F8B;&#x5982;&#x5728;&#x5F02;&#x6B65;&#x8FC7;&#x7A0B;&#x4E2D;&#x3002;<code>runInAction(f)</code> &#x662F; <code>action(f)()</code> &#x7684;&#x8BED;&#x6CD5;&#x7CD6;&#x3002;</p>

                                
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